@misc{29121,
  author = {Stanley Gilbert},
  title = {Characterization of the US Construction Labor Supply},
  year = {2012},
  month = {2012-12-21},
  publisher = {Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.SP.1135},
  language = {en},
}